I am the Original poster. I was not logged in when I opened this thread (Shame on me). I am looking for a recomndation on RAM chips.
From Microsoft article listed in previous posting:
On a computer that has 4 gigabytes (GB) of random access memory (RAM), the System Properties dialog box and the System Information dialog box may report less memory than you expect.
This problem occurs in Windows Vista and in Windows Server 2003.
CAUSE
This problem occurs because the address space is limited to 4 GB in a 32-bit hardware environment. Memory may be relocated to make room for addresses that the basic input/output system (BIOS) reserves for hardware. However, because of this limitation, Windows Server 2003 and Windows Vista cannot access memory that is relocated above the 4 GB boundary.
Windows Vista and Server 2003
A 32-bit operating system can address memory that is relocated above the 4 GB boundary if the following conditions are true: •The computer is in Physical Address Extension (PAE) mode.•The computer has 4 GB of RAM.In this case, the operating system correctly reports how much memory is installed.
To enable PAE mode, you have to add PAE to the boot entry in the BCD file. Open an elevated command prompt. Type BCDEDIT /SET PAE ForceEnable.
The article continues with more detail and references other articles.
hardware
prices 
